Enroll to acquire the most recent functionality and luxury automotive information, delivered to your inbox day-to-day! Major TaleThe RB25DE cylinder head with the A31 Cefiro C33 Laurel or R32 Skyline (aka: Non VCT) might be used. The RB25DET (from the R33 Skyline or C34 Laurel or Stagea) head is usually used, having said that an exterior oil feed s